How to use tcpdump to catch XML RPC requests sent from POA to external systems

Cause

Sometimes it is needed to track XML RPC calls which are sent by POA to an external system (e.g. PBA, Sitebuilder, ZKM, COMET, ODIN, etc) or back.

Resolution

Run the 'tcpdump' utility on POA Management Node with the following options: tcpdump -pnXs0 host <external.system.ip.address> -w out.file
or tcpdump -pnXs0 -i <iface> host <external.system.ip.address> -w out.file
in case you have to specify the exact network interface.

After you captured required packets, check output in the out.file file.